Examples of IIOByteBuffer

javax.imageio.stream.IIOByteBuffer
A class representing a mutable reference to an array of bytes and an offset and length within that array. IIOByteBuffer is used by ImageInputStream to supply a sequence of bytes to the caller, possibly with fewer copies than using the conventional read methods that take a user-supplied byte array.
The byte array referenced by an IIOByteBuffer will generally be part of an internal data structure belonging to an ImageReader implementation; its contents should be considered read-only and must not be modified.

Examples of javax.imageio.stream.IIOByteBuffer

public class setOffset
  implements Testlet
{
  public void test(TestHarness h)
  {
    IIOByteBuffer buf;
    byte[] b1 = new byte[] { 1, 2, 3 };


    // Check #1.
    buf = new IIOByteBuffer(b1, 0, 1);
    buf.setOffset(1);
    h.check(buf.getOffset(), 1);


    // Check #2: Offset greater than array length.
    buf.setOffset(99);
    h.check(buf.getOffset(), 99);


    // Check #3: Offset negative.
    buf.setOffset(-42);
    h.check(buf.getOffset(), -42);
  }

View Full Code Here

Examples of javax.imageio.stream.IIOByteBuffer

public class setLength
  implements Testlet
{
  public void test(TestHarness h)
  {
    IIOByteBuffer buf;
    byte[] b1 = new byte[] { 1, 2, 3 };


    // Check #1.
    buf = new IIOByteBuffer(b1, 0, 1);
    buf.setLength(2);
    h.check(buf.getLength(), 2);


    // Check #2: Length greater than array length.
    buf.setLength(99);
    h.check(buf.getLength(), 99);


    // Check #3: Length negative.
    buf.setLength(-42);
    h.check(buf.getLength(), -42);
  }

View Full Code Here

Examples of javax.imageio.stream.IIOByteBuffer

        return r;
    }


    @Override
    public void readBytes(final IIOByteBuffer dest, final int n) throws IOException {
        final IIOByteBuffer copy = new IIOByteBuffer(dest.getData().clone(), dest.getOffset(), dest.getLength());
        expected.readBytes(dest, n);
        actual  .readBytes(copy,   n);
        final int offset = dest.getOffset();
        final int length = dest.getLength();
        assertEquals("offset", offset, copy.getOffset());
        assertEquals("length", length, copy.getLength());
        assertArrayEquals(Arrays.copyOfRange(dest.getData(), offset, offset + length),
                          Arrays.copyOfRange(copy.getData(), offset, offset + length));
    }

View Full Code Here

Examples of javax.imageio.stream.IIOByteBuffer

        int y1 = Math.min(y0 + blockHeight - 1, ymax);
        Box2i block = new Box2i(x0, y0, x1, y1);
        int size = source.readInt();
        int blockSize = computeTileSize(block);


        IIOByteBuffer buf = new IIOByteBuffer(null, 0, 0);
        source.readBytes(buf, size);
        if (size < blockSize) {
          cm.decompress(buf, block);
          if (buf.getLength() < blockSize) {
            throw new RuntimeException("Undersized block");
          }
        }
        f.write(buf.getData(), buf.getOffset(), buf.getLength());


        ByteBuffer inBuf = ByteBuffer.wrap(buf.getData(), buf.getOffset(), buf.getLength())
            .order(ByteOrder.LITTLE_ENDIAN);


        for (int y = y0; y <= y1; y++) {
          for (Channel channel : chlist.channels()) {
            String name = channel.getName();

View Full Code Here

Examples of javax.imageio.stream.IIOByteBuffer

    long blockPos = blockPtrPos + 8 * numBlocks;


    int maximumBlockSize = computeMaximumTileSize(new V2i(dw.getXSize(),
        Math.min(dw.getYSize(), cm.getScanLinesPerBlock())));
    byte[] blockData = new byte[maximumBlockSize];
    IIOByteBuffer buf = new IIOByteBuffer(null, 0, 0);
    ByteBuffer bytes = ByteBuffer.wrap(blockData).order(ByteOrder.LITTLE_ENDIAN);


    int firstBlock;
    int lastBlock;
    int blockIncr;
    switch (getLineOrder()) {
    case INCREASING_Y:
    case RANDOM_Y:
      firstBlock = 0;
      lastBlock = numBlocks;
      blockIncr = 1;
      break;


    case DECREASING_Y:
      firstBlock = numBlocks - 1;
      lastBlock = -1;
      blockIncr = -1;
      break;


    default:
      throw new UnexpectedException("Invalid line order");
    }


    for (int i = firstBlock; i != lastBlock; i += blockIncr) {
      out.seek(blockPtrPos + 8 * i);
      out.writeLong(blockPos - start);
      out.seek(blockPos);
      bytes.rewind();


      // TODO write the next block here
      int x0 = dw.getXMin();
      int x1 = dw.getXMax();
      int y0 = dw.getYMin() + i * cm.getScanLinesPerBlock();
      int y1 = Math.min(y0 + cm.getScanLinesPerBlock() - 1, dw.getYMax());
      Box2i block = new Box2i(x0, y0, x1, y1);
      int blockSize = computeTileSize(block);


      for (int y = y0; y <= y1; y++) {
        for (Channel channel : chlist.channels()) {
          String name = channel.getName();
          int sx = channel.getxSampling();
          int sy = channel.getySampling();
          if (y % sy == 0) {
            int nx = 1 + (x1 - x0 - (x1 % sx)) / sx;
            int offset = ((y - ymin) / sy) * nx;
            Buffer chBuf = getChannelBuffer(name);
            PixelType pt = channel.getPixelType();


            switch (pt) {
            case UINT:
              bytes.asIntBuffer().put((IntBuffer)
                  ((IntBuffer) chBuf).duplicate().position(offset).limit(offset + nx));
              break;


            case HALF:
              bytes.asShortBuffer().put((ShortBuffer)
                  ((ShortBuffer) chBuf).duplicate().position(offset).limit(offset + nx));
              break;


            case FLOAT:
              bytes.asFloatBuffer().put((FloatBuffer)
                  ((FloatBuffer) chBuf).duplicate().position(offset).limit(offset + nx));
              break;


            default:
              throw new UnexpectedException("Invalid pixel type");
            }


            bytes.position(bytes.position() + nx * pt.getSampleSize());
          }
        }
      }


      buf.setData(blockData);
      buf.setOffset(0);
      buf.setLength(blockSize);
      cm.compress(buf, block);


      out.writeInt(y0);
      if (buf.getLength() < blockSize) {
        out.writeInt(buf.getLength());
        out.write(buf.getData(), buf.getOffset(), buf.getLength());
      } else {
        out.writeInt(blockSize);
        out.write(blockData);
      }

View Full Code Here

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.